Reading #412
193Moderatebkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:11:00 IST
PM2.5
88.0 µg/m³
PM10
88.0 µg/m³
Temperature
25.0 °C
Humidity
53.9 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0xb8a1a466b6d9f05c13262011551f493092febe4e7e3a359f681bb557046ef04b
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 02:12:13 IST (3 days after the reading)
- Queryable attributes
- device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793997660nonce = 412pm25_x10 = 880pm10_x10 = 880simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 412).ownedBy(0x3a1f21f1c6f05efa35bb7178274b41c8873cca67)
Check it yourself
Your browser just repeated the check the Readings contract does on-chain. The relayer only pays gas: changing any value would break the signature.
- ✓Step 1
Rebuild the 264-byte message
# Field Type Bytes Value Packed hex 1 device address 20 0x4379c30ae56431f0485731f6e730ee0084e955c0 0x4379c30ae56431f0485731f6e730ee0084e955c0 2 epoch uint256 32 1793997660 0x000000000000000000000000000000000000000000000000000000006aee3b5c 3 pm25_x10 uint256 32 880 0x0000000000000000000000000000000000000000000000000000000000000370 4 pm10_x10 uint256 32 880 0x0000000000000000000000000000000000000000000000000000000000000370 5 temp_x10 int256 32 250 0x00000000000000000000000000000000000000000000000000000000000000fa 6 hum_x10 uint256 32 539 0x000000000000000000000000000000000000000000000000000000000000021b 7 nonce uint256 32 412 0x000000000000000000000000000000000000000000000000000000000000019c 8 chainId uint256 32 11155111 0x0000000000000000000000000000000000000000000000000000000000aa36a7 9 readingsContract address 20 0x9192Fc053e1493EB2B7355192aa3F8e57AAE01d8 0x9192fc053e1493eb2b7355192aa3f8e57aae01d8 abi.encodePacked, no padding between fields. chainId and contract stop replay on other chains. Total: 264 bytes. - …Step 2
Hash it with keccak256
… - …Step 3
Recover the signer from the EIP-191 signature
r 0x967e16455b4f3a5d1d079dfbf894bc92568ae181315cd9ad75e150ccb4125b1ds 0x179f0b8c8672eeb32a3bba16a85a1aec13c6e314f3c7bd18aac79e7b05651906v 27recovered … - …Step 4
Compare with the registered device key
registered 0x4379c30ae56431f0485731f6e730ee0084e955c0 - ✓Step 5
Nonce strictly increases
Nonce 412 follows #411, so this reading can't be replayed. - ✓Step 6
Cross-checked against neighbours
Not flagged. The value agrees with neighbouring devices within the verifier's threshold.
Raw reading JSON
{
"device": "0x4379c30ae56431f0485731f6e730ee0084e955c0",
"ens": "bkc-01.prananet.eth",
"geohash": "te7u6n",
"epoch": 1793997660,
"pm25_x10": 880,
"pm10_x10": 880,
"temp_x10": 250,
"hum_x10": 539,
"nonce": 412,
"signature": "0x967e16455b4f3a5d1d079dfbf894bc92568ae181315cd9ad75e150ccb4125b1d179f0b8c8672eeb32a3bba16a85a1aec13c6e314f3c7bd18aac79e7b056519061b",
"simulated": false
}